Loom shuttle box



Sept. 14, 1937. w, H BAHAN 2,093,226

LOOM SHUTTLE BOX I Filed March 6, 1956 5 Sheets-Sheet 1 IHQEN-roz: WILLIAM H. 5RHHN Se t. 14, 1937. w. H. BAHAN LOOM SHUTTLE BOX Filed March 6, 1936 3 Sheets-Sheet 2 mm l v 2 N ww s a aw m. .filllu R N 1111111 ll nv 1| Om llwll III! III: I: II Z MN ..1 1| w HUI. U! l p w F MN mfi I n J. 393 a a 2 l 22 Q 8 2 8 8 & mm g Q ms 3 .8 B G 8 mm i HHHHIM 1/ o c Q 5 m Sm FL "I an WM.

WILLIAM H Bar-um hlvsm-ce.

ATTOENEY Sept. 14, 1937.- H. BAHAN LOOM SHUTTLELBOX Filed March 6, 1936 3 Sheets-Sheet 3 @b Q. g

Patented Sept. 14, 1937" UNITED STATES ATEN OFFICE r 2 Claims.

This invention relates to an improved shuttle box for looms in which means are provided whereby the shuttle may be expelled from a loose box and received into a loose box having means other than a binder for arresting the travel of the shuttle in the box.

In high speed looms, when the loom is weaving in the neighborhood of 180 to 200 picks per minute there must be an enormous pressure exerted on the binder of the shuttle boxes and the shuttle in order to effectively actuate the protection dagger and cause the loom to be stopped when there is no shuttle in either of the shuttle boxes. This excess pressure is objectionable, especially when the shuttle is leaving or entering a box because greater wear on the parts results as well as increased power cost for delivering the impact to the shuttle to cause the same to be properly boxed.

I have devised means whereby very high speed can be attained in a loom and the desideratum of having a loose shuttle box from which the shuttle is expelled and a loose box for receiving the shuttle is accomplished together with sufficient pressure being exerted on the protection dagger to cause it to operate quickly. I accomplish this by providing means for releasing the pressure on the binder in each box as the shuttle is being expelled from one box and before the shuttle reaches the box in the other side of the loom. In doing this, other means than the binder must be provided for arresting the travel of the shuttle. I provide cam means operated by a strap engaged by the picker or picker stick for stopping the travel of the shuttle. In this manner I provide a loom equipped with shuttle boxes and associated mechanism whereby great speed can be obtained and perfect weaving accomplished.

It is therefore, an object of this invention to provide a loom having shuttle boxes and also having means whereby the shuttle can be expelled from a loose shuttle box and received in a loose shuttle box.

It is another object of this invention to provide a loom having a pair of shuttle boxes at the ends of the lay of the loom and each shuttle box having a binder pivoted at the end disposed nearest the center of the loom and having its outer end pressed by tension means for exerting force on the shuttle contained within the box, and also having means whereby the pressure on the binders can be relieved as the shuttle is expelled from one of the shuttle boxes and before the shuttle is received in the other shuttle box,

together with means for engaging the side of the shuttle for arresting the travel of the shuttle independently of the binder, thus dispensing with the function of the binder requiring enough tension thereon to stop the travel of the shuttle.

It is a further object of this invention to provide a loom with means for engaging the dagger of the loom for holding the same in a position to relieve tension on the binders of shuttle boxes-in the loom when the lay of the loom is in a given position and for releasing the dagger while the lay is in other positions whereby tension can be applied to the binders in the shuttle boxes in the loom. 1

Some of the objects of the invention having been'stated, other objects will appear as the description proceeds when taken in connection with the accompanying drawings, in which:

Figure 1 is the front elevation of a loom showing the rocker shaft and the lay with the invention applied thereto;

' Figure 2 is a rear elevation of the right-hand shuttle box shown in Figure 1;

Figure 3 is a plan view taken along line 3-3 in Figure 2; I a

Figure 4 is a transverse sectional view taken along line 44 in Figure 1;

Figure 5 is a sectional plan view taken along line 55 in Figure 4; V V

Figure 6 is a longitudinal sectional detail view taken along line 6-6 in Figure 5;

Figure '7 is a sectional detail view taken along line 'l--! in Figure 4.

Referring more specifically to the drawings, the numerals I0 and H denote suitable end frames for a loom, in the lower end of which, is mounteda rocker shaft l2. This rocker shaft has picker stick shoes l3 and I3 on the ends thereof to which are secured picker sticks l4 and. I4, said picker sticks having secured on'the upper ends thereof pickers I5 and I5 respectively for propelling the shuttle transversely of the lay IS. The lay I6 is supported by swords I! and I1 which in'turn, have their lower ends secured to the rocker shaft l2.

Mounted on the right-hand upper portion of the lay l6, in Figure 1, is a shuttle box broadly denoted by the reference characterlll, whereas, on the opposite end of lay H5 is a shuttle box The shuttle box 20 is similar in construction to the'shuttle box 20, although it is evident that minor differences have to be made in the construction thereof to provide for the expulsion of-an empty bobbin and for receiving a full bobbin' into'the shuttle box 20'. However, this difference does not affect the operation of the present invention, and for purposes of description the parts in the shuttle box 26' can be considered opposite-hand from the parts in the shuttle box 20 in so far as the present invention is concerned.

Shuttle box 20 comprises a lay cap 2|, a box front 22, and a top back binder plate 23. Pivoted as at 24 near the frame of the loom is a pivoted back binder 25 which cooperates with the box front 22 in guiding the shuttle 26 properly into the shuttle box and also for applying pressure to the side thereof at specified intervals. The pivoted binder 25 comprises a member 21 which has secured on the inner side thereof a strip of suitable wearing material 28 such as leather for engaging the side of the shuttle. The binder may have a piece of resilient material 28a such as rubber disposed beneath the leather lining 28.

The box front 22 likewise has the wearing strip or lining 29 secured on the inner surface thereof for engagement of the other side of the shuttle when it is boxed. Strip 29 is preferably a leather strip.

There is also pivotally secured between the lay cap 2| and the top plate 23 a resilient eccentric cam 30 as at 3|. To this resilient eccentric is secured as at 32 a check strap 33, one end of said strap having secured thereto a tension spring 34, said tension spring having its other end secured to spring perch 35. The other end of the strap 33 is secured as at 3! to block 38 which block is pivoted as at 39 to the top of lay plate 2|. A suitable stop 40 is provided to limit the counterclockwise movement of the member 38, (Fig. 3').

The parts 36 to 40 inclusive are more fully shown and disclosed in my co-pending application Serial No. 42,914, filed September 30, 1935, but it is deemed necessary to make this showing to clearly disclose the operations of the invention. However, it might be stated that when the shuttle is thrown into the shuttle box 20 that it engages the picker l5 and forces the same backwardly against the check strap 33, which; in turn, will cause the resilient eccentric 30 to rotate in a counter-clockwise manner (Fig. 3), thereby engaging the side of the shuttle and exerting gradually increasing pressure and serving as a check for the shuttle.

A suitable leaf spring 43 is secured as at 44 to the upper portion of upright I! which supports one end of the lay. This leaf springnormally engages the back of member 25 to cause the same to be lightly pressed inwardly toward the inside of the shuttle box. It is evident that a slight pressure will be exerted upon the shuttle while in the box due to the pressure exerted by this leaf spring, however, this pressure is practically negligible in so far as checking the speed of the shuttle is concerned but merely tends to hold the same in the proper position to cause it to be properly boxed, whereas, the eccentric 30 and the strap 33 provide the major portion of the friction for checking the shuttle.

By referring to Figure 1 it will be noted that suitable bearings 50, 5| and 50 support a protection rod 52, which rod has secured on the ends tection rod isrotated. The protection rod also has secured on the ends thereof daggers 56 and.

56', which are held in the bold-line position shown in Figure 4 by the shuttle 26 being disposed in the shuttle box and these same bars are held in dotted line position by the adjustable block 6|. The dagger 56 is normally forced in a counter-clockwise direction about protection rod 52 (Fig. 4) by means of torsion springs 51 and 58 disposed on opposed sides of bearing 5|, said springs having one end thereof secured to collars 510. and 58a respectively, and their other ends secured to bearing 5|. 7 p 1 During the normal operation of the loom, shuttle 26 is propelled back and forth across the lay of the loom, first from one shuttle box to the other. When the shuttle is in the shuttle box 20 the parts of the lay are in bold-line position as shown in Figure 4, and it is seen in this position that the head of the bolt 54 in the upper end of lever 53 is contacting the back of the binder 25 to exert a pressure against the side of the shuttle 26. It is also seen that in this position the lower end of dagger 56 is held upwardly above the frog blocks 60, so that as the lay I6 oscillates about the rocker shaft I2, the member 60 will not be engaged by'the lowermost point of the dagger 56.

As the lay oscillates backwardly towards the dotted line position in Figure 4, the lowermost portion of the dagger 56 rides on top of a suitable block 6|.

By the time the lay has oscillated rearwardly a slight distance from the position shown in boldlines, the picker l5 engages the end of the shuttle 26 and impels it across to the other shuttle box 20'. It is therefore, evident that when the picker first engages the end of the shuttle to deliver an impact that the shuttle 26 is not tightly wedged in the box 20 by the pressure exerted by the binder 25 through the torsion springs 51 and 58, since the picker engages the shuttle after the dagger 56 rides upon block 6| to rotate the protection rod 52 in a clockwise manner and cause the lever 53 and bolt 54 to be moved away from binder 25. This will of course cause the head of the bolt 54 to move to the right in Figure 4 to relieve the pressure on the binder which will cause the shuttle to be comparatively free from friction when the stroke of the picker is exerted except for the slight pressure exerted by leaf spring 43. At the same time the pressure exerted upon the back of the binder in box 20' is relieved which will provide a loose box for the incoming shuttle to enter.

' In other words, this arrangement provides a loose box from which the shuttle is to be thrown Y and a loose box for the reception of the same. Likewise, when the shuttle is driven from the box 20 backwardly to the box 20, the same action takes place. It should be noted that when the shuttle 26 is in the box to cause the lower end of the daggers 56 and 56' to be high enough to clear the top edge of the frog blocks 60 on the backward stroke of the lay that thelower edge of the same daggers will contact the upper sides of blocks 6|.

The main object of providing blocks 6| is to relieve the pressure on the side of the shuttle as the same is being expelled from the shuttle spring is held in collars 51a and 58a on the rod 52. By rotatably adjusting these collars the amount of torsion exerted by the springs 51 and 58 may be regulated.

As has been stated, when the loom is operating at a very rapid speed, if enough torsion is placed upon the protection rod 52 to cause the daggers 56 to act promptly the pressure exerted upon the back binder 25 will be so excessive that the force necessary to drive the shuttle from the box into the opposed box and the increased Wear on the parts will be prohibitive. Therefore, means have been provided for temporarily releasing the pressure on the back binder during the throwing and the receiving of the shuttle. Otherwise, the operation of the loom and its associated parts is the same as in the conventional loom.

When the picker starts to expel the shuttle, the daggers have ridden onto blocks 6|, and thus the 20 pressure on the shuttle is relieved as it moves out of its box.

When the lay oscillates from the dotted line position in Figure 4 to the bold line position, that is, oscillates forwardly, if there is no shuttle in either of the boxes, then the torsion springs 57 and 58 will rotate the protection rod in acounterclockwise manner, in Figure 4, to cause the free end of daggers 56 to move downwardly and engage the frog block 66, which, in turn, will move the frog 62 to the left to stop the loom by parts which will be presently described.

The frog member 62 has upstanding members 63 and 64 integral therewith whose inturned flanges fit into suitable grooves in opposed sides This block is slidably confined between the two members 63 and 84 and has a suitable slot in one end thereof in which the round head of a bolt 66 is adapted to fit. This bolt is threadably secured in an upstanding lug 61 which lug is integral with frog member 62. By inserting a suitable screw driver in the slotted portion of the bolt 66, Figure 4, the position of the block 6| can be varied to properly adjust the amount of pressure, and the time of application of the same, on the back binder during the forward stroke of the lay of the loom.

It is evident that the torsion springs 51 and 58 may be adjusted to accommodate the amount of torsion desired to be exerted on protection rod 52. The time that the pressure exerted by the torsion spring is applied to and relieved from the binder 25 is determined by the adjustment of blocks 6|.

The frog 62 is slidably mounted on a suitable T-member Hi which is integral with the frame ID. A suitable slot '42 is cut in the top of the frog member in which the bar 60 is loosely mounted. This bar is confined within the slot 12 by suitable upstanding guide members 13 which have inturned flanges for limiting the upward movement of block 66 when the free end of the dagger 56 engages the same to cause the loom to be stopped. A suitable compression spring 15 is disposed between the T-member l and the closed end of the frog 62 for normally maintaining the frog in the position shown in Figures 4, and 6, and to cause the right-hand end thereof to normally rest against adjustable stop 76. This stop has a slot Tl therein penetrated by bolt 18 which secures the member 16 to the frame Ill. The frog 62 has an extension 88 integral therewith to which is secured a bar 8|, said bar 8| having a slot 82 thereon penetrated by a bolt 83 so that the bar 8| may be adjusted relative to the frog 62. The

left-hand end of this bar 8| normally engages the lower end of shipper rod lever 84 which is pivoted as at 85 to bracket 86, said bracket 86 being secured to the loom frame l0. On the forward stroke of the lay, if there is no shuttle disposed therein, the free end of the daggers 56 will engage the member 60 and cause the frog 62 along with the bar 8| to move to the left in Figures 4 and 5, which in turn, will rotate the lever 84 to operate the shipper rod and stop the apparatus.

However, if there is a shuttle in one of the boxes on the forward stroke of the loom, as should be the case if in normal operation, the free end of the dagger 56 will oscillate in an are which is disposed slightly above the top of the member 68, therefore, it will not be engaged by one of these bars.

It is seen that dagger 56 is maintained in practically the same position at all times during the oscillation of the lay, that is, if the shuttle is properly boxed, as it should be, because when it is not maintained in elevated position due to a shuttle being disposed in the box, the lay is in dotted line position (Fig. 4) where the block 60 supports it in this position. This feature has the advantage of being held relatively in one position, subject to being moved upon failure of a shuttle to box properly. In the conventional apparatus this dagger constantly oscillates about protection rod 52 since there is no block 6|, and therefore, when the lay oscillates at a very high speed it is necessary to subject the rod 52 to additional torsion to cause the dagger 56 to properly engage frog block 60 when the shuttle is not properly boxed.

In the drawings and specification there has been set forth a preferred embodiment of the invention, and although specific terms are employed, they are used in a generic and descriptive sense only, and not for purposes of limitation, the scope of the invention being set forth in the app-ended claims.

I claim:

1. In a loom having an oscillating lay provided with a dagger, a frog mounted on the loom and having a steel therein for engagement by the dagger under certain conditions, said frog also having an upstanding projection at one end remote from the steel, a bolt threadably mounted in said projection and having secured thereto a block member slidably mounted on the frog and being disposed in the line of travel of the dagger so that the dagger will ride upon said block to release the pressure on the binders in the shuttle boxes of the loom.

2. A loom frog having a steel at one end thereof, a pair of upwardly and inwardly projecting guides at the other end of the frog, a block slidably confined on the top of said frog by said guides, an upstanding projection on said frog having a threaded hole therethrough, and a threaded bolt having its head embedded in said block and having its threaded portion disposed in said threaded hole, whereby said block can be adjusted longitudinally of said frog, said loom also having a dagger for engagement with said steel under certain conditions when the dagger moves to one end of the frog and said dagger being engageable by said block to raise the same each time the dagger oscillates to the other end of the frog.

WILLIAM H. BAHAN. 

